Ration



-A. E. RHOADES.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED DEC-27. I918- Patented Aug. 17, 1920.

M In I .UNITEDSTATES AI-oNzo nnrroAnEs, or HOPEDALE, massacnusnrrs, rissrenon TO DRAPER CORPO- 1 7 narrow, OF'HOPEDALIE, MASSACHUSETTS, A conronnrron or MAINE.

PATENT OFFICE.

wnnr STOP-MOTiON ron ooms.

' To all whomit may concern:

' Be it known'that'I, ALoNzo E. RHoADns, a'citizen of the United States residing at Hopedale, in the county of 'W orcester and State of Massachusetts, have invented an Improvement in Warp "Stop-Motions for 'Looms of which the following description,

relates to warp-stop-motions for looms and more particularly to that type wherein a series of drop devices or detectorsare sup ported by the warpthreads, which upon breakage or undue slackness of one or more of said threads, permit such drop devices or detectors to move intoposition for cooperation witha feeler or vibrator and cause stoppage of the feeler and means actuated thereby to stop the loom.

The passage of the warp threads through the eyes of the detectors and across the rods, Or -rests" adjacent the detectors, causes lint or fluff to be deposited upon the parts adj acent thereto: This lint or'fluff if allowed'to accumulate, is liable to be caught on the warp thre'ad's andproducelumps which will -increase the danger of breakage of the threads, or result inan -1mpa1red woven fabric, and

in somecases mayfrenderthe detectors them selves less sensitive; V Heretofore, the feeler or vibrator has been usually located in a position where the lint, fluff or dirt may gravitate down, accumulate on, andobjectionablyclog the feeler or vibrator ordetectorsand parts cooperatingw therewith. The location of the feeler or vibrator hasalso been such that'ready access cannot be had thereto for the purpose of re moving'lint, flufi'or dirt therefrom.

One of theobjects of the lpresent invention, therefore,is to provide a feeler or vibrator mechanism which will automatically tend to remove-:flufl', lint and dirt from parts adjacent"the-detectors, and prevent objectionable accumulation'thereof. And another object "of the invention is to provide a warp-stop-mechanism which is simpler and cheap in construction, and reliable infoperation. l i .7

With the; aforesaidand :other objects in view,tthe character'of the invention may be bestaunderstood by reference to the following description of-one goodiform thereof warp threads 7 Specification of Letters Patent. Patented Aug. 17, 1920; Application filed-December 27, 1918. Serial No. 268,562.

shown in the wherein: V I Figure 1 is a perspective view of a portion of a loom showing the warp-stop-mechanism of the present invention, some of the parts being shown in section;

Fig. '2 is a transverse section affording one yiegv 0f the feeler operating mechanism; an 7 v Fig. 8 on an enlarged scale is a view somewhat similar to Fig. 2, showing therelation of feelers to detectors, one supported by a warp thread, and the other unsupported by a warp thread. 1

, Referring to the drawing, the loom frame may be of any usualor desired character suitable for the supportof the loom parts. Rising from each side ofthe loom is a stand 1 which may be located between" the shed ding devices-"or heddles and the whip roll accompanying drawing,

' over which the warp threads pass from the warp beam, said parts being as usual in con:

struction' and operation.

Each of the stands "1 carries an end'supfor the parts of the warp-stop-motio'n. EX

tending transversely of'the loom andsupported at the upper portions of the end sup ports, are the warpIrods 5, over which the pass and by which they are sustained. In the present form of the invention, each of the warp threads between the warpirods, sustains a detector or drop device 9, each, in the present instance, i'n the form of a thin, fiat strip of metal. containing a warp re ceiving'eye 1 1, an'elongated slot or guide'13,

and a notch'or recess 15 located preferably 7 a substantial distance above the lower end of'the detector. This notch or recess has outwardly divergent top and bottom walls as shown, which allows the feeler to enter and vibrate therein when thedetector is suspendedby the warp thread even though the position'by loom vibration or other disturb- I their ends I detachably secured to the upper ends of the end supports 3. When the detec'- tors are .sustainedby the warp threads-the upper ends of the elongated slots 18 will stand above the bars 17, but if a warp thread breaks or becomes unduly slack, the detector for such thread will drop down to the position shown at the right of Fig. 3,

are located directly above the bridge bars 19. Suitable means may be provided to vi brute or reciprocate the feelers and cause the same alternately to enter and recede from the notches or recesses 15. in the detectors when the latter are sustained by the warp threads. To accomplish this, in the present instance, the ends of the feelers are suitably secured to slides 25 disposed transversely to the supporting bars 19 and adapted to reciprocate in guides conveniently in the form of notches 27 in said bars, Links 29 have ends pivotally connected to pins 31 (Fig. 3) on the slides and opposite ends pivotally connected to pins 33 carried by short arms 35 projecting from bosses 37 fast on a rock shaft 39 mounted in bearings 41 carried by the end supports 3, referred to. Depending from one of the bosses 3'? is a long arm 43 connected by a link 45 with 'an arm 47 fast on a rock shaft 49 journaled in bearings carried by the end supports 3. The construction is such that when the shaft 49 'is rocked through the connections described, the slides 25 will be reciprocated and cause vibration of the feelers 21 on the bars 19. The feelers will continue to vibrate so long as the detectors are sustained by the warp threads and the outwardly divergent top and bottom walls of the recess 15 will permit the vibrator or feeler to en ter the recess even though the detectors may be disturbed from their normal warp thread suspended positions. Under these conditions the detectors will themselves be moved in a vertical direction or be given a feeler movement so long as they are not sufficiently slack to fully drop the detector, but if a thread becomes broken or unduly slack,

the detector therefor will drop to the position shown at'the right of Fig. 3, and thereupon will be engaged by the feeler at a point somewhat above the recess .15 in the detector, and prevent further vibration of the feeler.

To, resist the pressure of the feeler against the detectors, back rests or stops 51 may be provided conveniently in the form of metal strips secured to the upper edges of the bars 19, and in the present instance,'having toothed or serrated edges 53. The opposed serrated edges of aback rest and feeler'will engage opposed edges of the detectors above erated by any suitable means, such that upon obstruction to-its rocking movement, as by the dropplng of a detector 1n front of a feeler to prevent vibration of the latter, said means will actuate the usual shipper lever of the loom and cause stoppage of the latter. As such means and their connections with the shipper are well known in the art, a full illustration thereof is not herein deemed necessary, and for detailed illustration and description of one appropriate form of such means, reference may be had to Letters Patent of the United States, No. 673,824, granted in the name of Edward S. Stimpson, May 7 1901. I As in said patent, the rock shaft 49 has loose and fixed arms f and f and connections 72, and [L3 with the coacting parts between these parts and the shipper lever, all of which is fully explained in said patent. 1 p

In the event of breakage or undue slackness of a warp thread, the detector therefor will drop and prevent vibration of the feeler cooperating therewith, and prevent further rocking of the rock shaft 49; This will prevent rocking of the fixed arm f and through the connection If and means, such, for, example, as illustrated in the aforesaid patent, willactuate the shipper and stop theloom. r 7 7 The continuous reciprocation ofthe feelers above the upper edges of the bars 19, will continuously tend to remove lint, fluff and dust from the parts, and since the feelers are not beneath the lower ends of the detectors, the spaces between the bars 19 afford free passages to allow escape of the lint, fluff and dust from the loom. The feel: ers being above the bars 19, and above the lower ends of the detectors, are so located that convenient access may be had thereto, for the purpose of cleaning the same if re quired. v

The warp-stop-mechanism, described is simple and strong in construction, the parts thereof are easily assembled, and reliable in operation. i e 7 Having described one good form of the invention without limiting the same there to, what I claim as new and desire to secure by Letters Patent is i 3 Claims. I,

1. In a-warp stop motion for looms, the combination of a stand at each side of the loom, end supports secured thereto, bridge bars secured at their oppositev ends to the end supports and presenting unobstructed spaces between them for the passage of lint or fluff, a slide mounted on the ends of the bridge bars,feelers secured to the slides'and resting on the tops of the bridge bars, a vibrator having a link connection with the slidesto reciprocate the feeler over thetop of the bridge bars and adapted to remove therefrom any accumulation of lint or flufi,

and a series of detectors each having a re cess into which the feelers extend when the detectors are supported by the Warp threads. 7 V

2. In a warp stop motion for looms, the

combination of end supports, bridge bars and detector guides secured at their opposite ends to the end supports and presenting unobstructed spaces between them for the free passage of lint or fluff, the opposite end portions of the bridge bars being provided with guiding recesses, slides mounted in the between the slides and resting on the top portions of the bridge bars and acting to remove lint and fluff therefrom as they are reciprocated on said bars, and a series of detectors extending between each of the bridge bars and each having a recess for the entrance of the feeler when the detectors are supported by normal warp threads. v

3. In a warp stop motion for looms, the combination of bridge bars havingan unobstructed space between them through which lint and fluff may pass, feelers munt ed for movement over the top of the bridge bars, means including a rock-shaft and link connections for moving the feelers over the bridge bars, and a series of detectors each having a recesswith an outwardly divergent wall into which the feelers 'move when the detectors are supported by non-faulty Warp ALONZO E. RHOADES. 

